Which service model provides hardware hosted at a provider facility, with the provider responsible for infrastructure, physical security, and utilities like power?

Infrastructure as a Service (IaaS) is the correct answer because it encompasses the delivery of virtualized computing resources over the internet. In this model, the service provider manages the physical hardware, including servers, storage, networking equipment, and the facility itself. This includes responsibilities for infrastructure, physical security, and utilities like power.

With IaaS, users can rent these resources on a pay-as-you-go basis, allowing them to scale their computing needs without the burden of maintaining physical hardware. This model offers significant flexibility for businesses, enabling them to deploy and manage applications without investing in physical infrastructure.

In contrast, other service models focus on different layers of the stack. Software as a Service (SaaS) delivers software applications over the internet without users needing to manage the underlying infrastructure or platforms. Platform as a Service (PaaS) provides a platform allowing developers to build, test, and deploy applications without dealing with the underlying hardware and operating system, but it still doesn’t cover the physical layer like IaaS does. Disaster Recovery as a Service (DRaaS) specifically focuses on backup and recovery solutions rather than the general infrastructure management that is characteristic of IaaS. Thus, IaaS is uniquely positioned to offer the